Rotor, brushless motor, and method for manufacturing rotor

A rotor rotatable around a predetermined centerline, comprising:

• a columnar magnet;
• a magnet case covering at least a part of an outer circumferential surface of the magnet;
• and
• a rotating shaft with a shaft part and a cylindrical part, wherein
• the cylindrical part of the rotating shaft covers an outer circumferential surface of an end portion of the magnet case in a direction of the centerline, and
• the outer circumferential surface of the end portion of the magnet case and an inner circumferential surface of the cylindrical part of the rotating shaft are joined by an adhesive agent, and an end surface of the magnet in the direction of the centerline, which is covered with the end portion of the magnet case, and an end surface of the rotating shaft in the direction of the centerline, which faces the end surface of the magnet, are not joined.

A rotor rotatable around a predetermined centerline, comprising:

• a columnar magnet;
• a magnet case covering at least a part of an outer circumferential surface of the magnet;
• and
• a rotating shaft with a shaft part and a cylindrical part, wherein
• the cylindrical part of the rotating shaft covers an outer circumferential surface of an end portion of the magnet case in a direction of the centerline,
• the magnet case includes a case cylindrical part covering an outer circumferential surface of an end portion of the magnet in the direction of the centerline, and a cover part covering an end surface of the end portion of the magnet in the direction of the centerline, and
• an outer circumferential surface of the case cylindrical part of the magnet case and an inner circumferential surface of the cylindrical part of the rotating shaft are joined by an adhesive agent, and an end surface of the cover part of the magnet case in the direction of the centerline and an end surface of the rotating shaft in the direction of the centerline, which faces the end surface of the cover part, are not joined.